Non-Aqueous Molecular Processing of Sulfide Powder and Ceramics

这一研究计划的总体目标是合成含有金属-硫键的新型前驱体；对硫化物陶瓷前驱体形成和结构演变所涉及的分子过程有一个基本的了解；并将前驱体化学与致密陶瓷的微观结构和光学性质联系起来。选择立方硫化镧作为研究的代表性体系。其他硫化物，如硫化钛、硫化锌和硫化镓，也可以选择用于这项研究。%本研究旨在用改性金属醇盐和金属硫代醇盐合成对氧有很强亲和力的活性金属硫化物陶瓷。这些金属包括镧、钛、锌和镓。这项研究将寻求对硫化物陶瓷前驱体形成和随后演变所涉及的分子过程的基本理解。这项研究将增进我们在非氧化物硫化物陶瓷受控化学合成领域的知识。

The overall objectives of this research program are to synthesize novel precursors containing metal-sulfur linkages; to develop a fundamental understanding of the molecular processes involved in the formation of precursors and structural evolution of the sulfide ceramics; and, to correlate the precursor chemistry with the microstructure and optical properties of the dense ceramic. Cubic lanthanum sulfide is selected as the representative system in the studies. Other sulfides, such as titanium sulfide, zinc sulfide, and gallium sulfide, can also be selected for this study. %%% This proposed research aims to use modified metal alkoxide and metal thioalkoxide to synthesize sulfide ceramics of reactive metals which have strong affinity for oxygen. These metals include lanthanum, titanium, zinc, and gallium. This studies will seek fundamental understandings of the molecular processes involved in the formation of precursors and the subsequent evolution of sulfide ceramics. This study shall enhance our knowledge in the area of controlled chemical synthesis of non-oxide sulfide ceramics.